QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

14 km NNE of Lyman, Washington

· 0.6 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Skagit County 24 kmWhatcom County 24 kmSnohomish County 70 kmIsland County 74 kmSan Juan County 82 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.8 (ml)
Depth
0.6 km below the surface
Felt
no reports yet
Nearest
Skagit County, 24 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 827 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 48.6582, -122.0182. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Skagit County, WA 24 km (15 mi) NW of here earthquakes near Skagit County
Whatcom County, WA 24 km (15 mi) SSW of here earthquakes near Whatcom County
Snohomish County, WA 70 km (43 mi) NNW of here earthquakes near Snohomish County
Island County, WA 74 km (46 mi) NE of here earthquakes near Island County
San Juan County, WA 82 km (51 mi) ENE of here earthquakes near San Juan County
Kitsap County, WA 123 km (76 mi) NNE of here earthquakes near Kitsap County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

55 earthquakes have been recorded within 50 km since this one.

  1. 2.3 1 km NNE of La Conner, Washington
  2. 1.9 3 km E of Bay View, Washington
  3. 1.7 4 km WSW of Concrete, Washington
  4. 2.9 4 km WSW of Concrete, Washington
  5. 2.6 4 km WSW of Concrete, Washington
  6. 2.1 4 km SE of Mount Vernon, Washington
  7. 2.0 4 km WNW of Edison, Washington
  8. 2.2 2 km NNE of La Conner, Washington
  9. 2.1 2 km NNE of La Conner, Washington
  10. 2.1 2 km NE of La Conner, Washington
  11. 1.9 2 km NE of La Conner, Washington
  12. 1.8 8 km SSW of Chilliwack, Canada
  13. 1.5 4 km WSW of Concrete, Washington
  14. 1.6 4 km W of Mount Vernon, Washington
  15. 1.7 4 km W of Mount Vernon, Washington

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.